[RFI] Choke questions

[Dave Cole]

Hi Andy,
Take a look at Jim's Choke Cookbook at:

http://k9yc.com/2018Cookbook.pdf

It is the reference for me...  Look at some of his other publications as 
well...  He covers most everything regarding chokes.

73, and thanks,
Dave (NK7Z)
https://www.nk7z.net
ARRL Volunteer Examiner
ARRL Technical Specialist
ARRL Asst. Director, NW Division, Technical Resources

On 1/21/20 7:28 AM, Andy KU7T wrote:
> Hi,
> these may dumb questions (I am a choke newbee, but working myself up to the skillset to build my own to specific needs)...
> 
> A recommended method and material to use is #31 and a #12 THHN pair of wire (non-twisted). Since these are un-shielded wires, wouldn't this cause additional RF exposed where we do not need it?  Or does the field cancel because of the closeness of the pair of wires?
> 
> I would also have the opportunity to use thinner coax of the right impedance to make a choke. Why is the THHN wire better than coax?
> 
> Thanks and 73
> Andy
> KU7T
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